5N High-purity Alumina
1. Sapphire crystals and LED substrates
2. Coatings for lithium-ion battery separators
3. Transparent ceramics and high-performance ceramics
4. Precision polishing
5. Bioceramics
6. Catalyst supports
- Product Description
5N High-purity Alumina (≥99.999%) for Sapphire, LED and Battery Separator Coatings
Sapphire and LED manufacturers require raw material with very low impurity levels. For these procedures, Xi’an PUTAI 5N High-purity Alumina possesses purity of ≥99.999% in α-phase, melting point of 2072 °C and great chemical inertness at high temperature. This grade is often used for sapphire crystals, LED substrates, lithium-ion battery separator coatings, clear ceramics, precise polishing and catalyst supports. Here’s a rundown of the technical facts and buying points so you can check the fit before you ask.
5N High-purity Alumina Specifications
The table lists the data currently available for 5N High-purity Alumina.
| Parameter | Specification |
|---|---|
| Product | 5N grade α-alumina |
| Purity | ≥99.999% |
| Crystal phase | α-phase |
| Melting point | 2072 °C |
| Chemical behavior | Strong chemical inertness; almost no reaction with other substances at high temperature |
| Model | Appearance | Crystalline | Partical size (nm) | Purity (%) | Specific area (m2/g) | Application |
5N | ||||||
| YW-L100G | white powder | a phase | 0.3-10um | 99.999 | 5-15 | sapphire crystal |
YW-L500G | white powder | a phase | 500nm | 99.999 | 5-15 | separator coatings for lithium-ion batteries |
YW-L20GY | white powder | γ phase | 10-20nm | 99.999 | 100-160 | ceramic |
YW-L30G | white powder | mixed crystal | 30-50nm | 99.999 | 20-40 | ceramic, coating |
| 6N | ||||||
YW-L300N | white powder | a phase | 1-20um | 99.9999 | 5-15 | laser crystal |
YW-L200N | white powder | a phase | 0.2-5um | 99.9999 | 5-15 | PTFE additive |
Other parameters, such as particle size, specific impurity limits and test reports, are not listed here. Please request them from our sales team before ordering.
Why Purity Matters for Sapphire Crystal Growth
Sapphire growth is sensitive to purity of basic materials. The high purity promotes a clear crystal free from bubbles and light dispersion.
Impurities are able to diminish the transmittance of sapphire and in certain circumstances can lead to the failure of crystal formation. Hence, a feedstock of ≥ 99.999 % is a reasonable starting point for the fabrication of LED substrates.
Use in Sputtering Targets
Alumina is also used as a material for a sputtering target. The transition from 3N to 4N and finally to 5N purity is correlated with improved film qualities, particularly insulation voltage resistance and coating uniformity. The test results are not available on this page. Please contact our team for supporting material for your own review.
Thermal and Chemical Stability
The α-phase material has a reported melting point of 2072 °C and so is suitable for extremely high temperature applications.
It is chemically inert, too. It reacts little with other chemicals at high temperature . This is important in crystal formation and high temperature ceramics.
Application Fields
The following industries employ product:
- Sapphire crystals with LED substrates: Transparency in crystal development is given by purity.
- Separator coatings for lithium-ion batteries: High-purity alumina for coating layers of separator films.
- Transparent, High-Performance Ceramics: Purity is crucial for both optical clarity and mechanical performance.
- Precision polishing: Alumina for a clean finish on surfaces with high finish demands.
- Bioceramics: Inert chemicals for biomedical ceramic parts
- Catalyst provides: Thermal & chemical stability for support structures.
Purchasing Notes for B2B Buyers
First, make sure your purity goal is correct. The declared purity of 5N High-purity Alumina is > 99.999%. Then match the grade to your process, since sapphire growth, sputtering targets, separator coatings and polishing all impose various demands on the material. Tell us about your application and estimated volume so our staff can assess the fit. Particle size, impurity limit, packaging, MOQ and lead time are not stated on this site, please check with sales and raise specification needs before you buy.
About Xi'an PUTAI Environmental Protection Co., Ltd.
PUTAI is a public business (stock code 839410) established in August 2008. It has over 16 years of expertise in water treatment chemicals, including wastewater treatment and drinking water purification solutions, and its work is focused on resource recovery and environmental preservation.
The firm has two manufacturing bases with a total area of more than 30,000 m² and 100,000 m², and spent RMB 400 million in its facilities. The new 2.0 manufacturing facility has an annual capacity of about 200,000 tonnes of water treatment chemicals, not alumina. PUTAI also provides high purity polyaluminium chloride (white PAC) for water treatment. PUTAI integrates R&D, manufacturing, sales and associated service.
FAQ
Q1: What is 5N in product?
A: It signifies purity of 99.999% or above.
Q2: Why is purity important for sapphire crystals?
A: To be transparent, without bubbles or dispersion of light, it must be very pure. Impurities decrease transmittance, and may induce failure of crystal formation.
Q3: What’s the melting point?
A: The α phase melts at 2072°C. It is also very chemically inert at high temperature.
Q4: What industries utilise this material?
A: Typical applications include sapphire and LED substrates, battery separator coatings, ceramics, precision polishing, bioceramics and catalyst supports.
Q5: Does the purity grade impact sputtered films?
A: Higher purity from 3N to 4N and 5N is connected to improved insulating voltage resistance and uniformity of film. If you require help data, ask our staff.
Q6: How do I ask for a quotation?
A: Please email your application, purity objective and projected quantity to sales@ywputai.com.
Contact Us
Send your application, purity target and expected volume to sales@ywputai.com. Our team will reply with the available details on 5N High-purity Alumina for your project.
